EP0353800A2 - Méthode et appareil pour manipuler les plantes - Google Patents

Méthode et appareil pour manipuler les plantes Download PDF

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Publication number
EP0353800A2
EP0353800A2 EP89201783A EP89201783A EP0353800A2 EP 0353800 A2 EP0353800 A2 EP 0353800A2 EP 89201783 A EP89201783 A EP 89201783A EP 89201783 A EP89201783 A EP 89201783A EP 0353800 A2 EP0353800 A2 EP 0353800A2
Authority
EP
European Patent Office
Prior art keywords
plants
station
plant
holders
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89201783A
Other languages
German (de)
English (en)
Other versions
EP0353800A3 (fr
Inventor
Adrianus Franciscus Maria Flaton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NL8801721A external-priority patent/NL8801721A/nl
Application filed by Individual filed Critical Individual
Publication of EP0353800A2 publication Critical patent/EP0353800A2/fr
Publication of EP0353800A3 publication Critical patent/EP0353800A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C11/00—Transplanting machines
    • A01C11/02—Transplanting machines for seedlings
    • A01C11/025—Transplanting machines using seedling trays; Devices for removing the seedlings from the trays
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G2/00—Vegetative propagation
    • A01G2/10—Vegetative propagation by means of cuttings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/12—Sorting according to size characterised by the application to particular articles, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • B07C5/3422—Sorting according to other particular properties according to optical properties, e.g. colour using video scanning devices, e.g. TV-cameras

Definitions

  • the invention relates to a method for handling plants.
  • Such plants can be rootless, for instance in the case of cuttings which are planted in soil in order to then grow into adult plants. Plants are difficult to process auto­matically, that is, with mechanical devices, mainly because of their unpredictable shape.
  • the plants are presented as a bundle, in the known method they are still removed manually from the bundle one by one, to be then pro­cessed, once again by hand, for instance cut, planted or packed.
  • the invention has for its object to facilitate the handling of plants.
  • a method for planting according to the invention has the feature that each plant is transported separately via a pipe and arranged with its bottom end in a planting hole arranged in soil, the diameter of this hole being considerably larger than the stem of this plant, whereby the plant is guided into the planting hole by means of the pipe. This can be performed automatically.
  • the planting hole is filled with slurry the supply line can be lifted up, while the plant is held sufficiently firmly in the spacious planting hole. The portions of soil are not destroyed during the injection of slurry.
  • a more or less thick suspen­sion of soil, water and optional nutrients or germination stimulating substances can serve as slurry.
  • the slurry is preferably a thick liquid.
  • a method according to the invention for handling plants has, in order to enable automatic discharge from a transporting device when the supply of individually separated plants to this transporting device is irregular, the feature that the plants are transported separately in holders from an intake station to a discharge station, whereby the holders are connected to at least one endless transporter element, that the transporting movements of the holders are disengaged from each other at the location of the intake station and that there is variation in opposing directions between both parts of the transporter element.
  • the invention also relates to and provides a device for handling plants. Such devices are designated in the claims 14-26.
  • the device from fig. 1 is a device for handling plants, and particularly for planting cuttings.
  • the device 1 comprises a feed belt 2 on which are supplied sacks with bundles of cuttings 3. These cuttings are laid spread out by a person onto a conveyor belt 4 with their bottom ends 5 protruding and against a stop rail 6.
  • This stop rail 6 is arranged on an endless belt 9 driven at the same speed as belt 4.
  • a trans­porting device 7 Disposed after the belt 9 as seen in the conveying direction and also adjacent to the conveyor belt 4 is a trans­porting device 7 of which two endless ropes 8 co-act for firm gripping of the bottom ends 5. These ropes 8 are trained and driven by rollers 10 which are disposed such that the cuttings 3 are carried from a lying position into a vertically hanging position.
  • the belts 4 and 9 and the ropes 8 are driven constantly while the belt 2 is driven by the operative as required in each case, this usually being done stepwise and particularly at lower speed.
  • the cuttings 3 supplied close together in vertical hanging position are individually separated in an individual separation device 11.
  • This consists of two series of rollers 12 co-acting in pairs and two series of rollers 13 co-acting in pairs which are arranged - as seen in the direction of movement of the cuttings 3 - between the rollers 12 and in staggered position relative thereto, this such that each cutting is gripped and transported alternately by a pair of rollers 12 and a pair of rollers 13.
  • the drive speed of the rollers 12 and 13, which in this embodiment have the same diameter, increases in the direction of transport of the cuttings 3 since the successive rollers 12, 13 are driven with increasing rope gears 14.
  • the peripheral speeds are equal per pair of co-acting rollers 12, 13 because the left and right half of this individual sepa­ration device are mutually connected by means of toothed wheels 16.
  • the individual separation device is driven by means of a shaft 17, a rope drive gear 18, a shaft 19 and increasing drive gears 20 from the rope conveyor 7.
  • a first acceleration of the cuttings 3 thus takes place already at the transition from rope conveyor 7 to the rollers 12, 13.
  • the ropes 8 are provided with a thick layer 22 of foam rubber.
  • the rollers 12, 13 also have a thick ring 23 of foam rubber.
  • the rope conveyor 25 takes in principle the same form as rope conveyor 8.
  • Fig. 6 shows the disposition of diverse guide rollers 26 for the ropes 27 coated with a layer 28 of foam rubber.
  • the rope conveyor 25 is driven from the individual separation device via an increasing drive gear 14 so that also at this transition there occurs an extra acceleration and therefore an increase in the spacing between the cuttings 3.
  • the rope conveyor 25 deposits the cuttings 3, spaced and facing in the same direction in horizontal position, onto a belt conveyor 30 above which is situated a detector 31 which via a computer 32 or other control means controls the drive motor 35 of a toothed wheel 33 of a chain conveyor 34.
  • the chain conveyor 34 comprises an endless chain 37 whereby holders 39 are fixed at regular intervals to links 38. These holders consist of a part cylinder shaped plate.
  • the chain 37 is trained around stationary chain wheels 33, 49, 40 and 42 and around displaceable chain wheels 41 and 50 which are mounted on the respective sliding rods 43 and 45 which are forced away from one another by means of a spring 44.
  • the toothed wheel 40 is driven periodically for stepwise driving of holders 39 past the discharge station 46.
  • the two parts 47 and 48 of the chain 37 can be extended or contracted in opposing directions or vice versa so that the driving of the holders 39 past the discharge station 46 is disengaged from the driving of the holders 39 at the position of the intake station 51, which driving is dependent on the not easily predictable supply of individually separated cuttings 3 by the individual separation device 11.
  • the detector 31 When there is too little or too much supply by the rope conveyor 25 the detector 31 will slow down or if neces­sary stop or accelerate the speed 52 via the computer 32.
  • the holders 39 face towards the oncoming cuttings 3 with their opening 53.
  • trays 55 with soil portions 56 are driven stepwise in arrow direction 58 on a conveyor belt 57, whereby the portions 56 are first provided with holes 62 for plants by means of a beam 59 with pins 60. This is performed in each case with a row of soil portions 56 at a time.
  • the soil portions provided with planting holes 62 arrive beneath the planter 63.
  • This planter comprises a row of eight pipes 64 which each connect onto a pneumatic transport conduit 65 which intersects the path of the holders 39 at the position of the discharge station 46.
  • a series of eight holders 39 filled with cuttings 3 is first brought into line with the pneumatic conduits 65.
  • the chain 37 is then brought to a stop here. Air is then blown simultaneously through all eight conduits 65, which results in the cuttings 3 being blown out of holders 39 into the planting holes 62, in which they come to stand loose­ly with their bottom ends 5.
  • a beam 68 with frustum pyramid-shaped recesses 69 is subsequently lowered, as a result of which a portion of this beam 68 becomes active as a pressure member 60 around the planting hole 62 and moves surrounding soil towards the planting hole 62 so that the cutting 3 is fixed into the soil well but still lightly.
  • the outer periphery of each pressure member corresponds with the periphery of a soil portion 56 required for a cutting, which portion is slightly separated as a result from adjoining portions 56.
  • the valve placing the air blowing unit (not shown) in connection with the conduits 65 is controlled by a computer (not shown), as are the movements of the beam 68 and the stepwise driving of chain wheel 40 by means of a motor 70.
  • the cuttings 3 are individually separated while they are pushed over a flat, smooth table 80 by means of rollers 82 and 83 which are in mutually staggered position and which likewise fulfil the function, each in co-action with the slide surface, of a pair of rollers 12 and 13 as in fig. 4.
  • Liquid hormones are preferably injected into the planting holes before the cuttings are inserted therein.
  • the cuttings are sorted out by means of video cameras into diverse length sizes and optionally also by weight prior to being planted.
  • the individually separated plants, in this case rootless plants, i.e. cuttings 3, are conveyed past a blower device 86 where they are blown against a stop surface 88 by means of air in an air tunnel 87 which connects onto the partitions 91 of the conveyor belt 3.
  • the air enters via an air feed 89 and flows via openings 90.
  • the cuttings 3 fall off the conveyor belt 30 at a scanning station 100 and then drop through scanning means formed by a plurality of, for instance three, light sources 92, reflector plate 96 and scanners 93, 94 and 95 in the form of a light sensitive cell.
  • the scanner 93 determines by the stem the presence of a plant 3, while scanners 94 determine whether the plant 3 is large or small enough.
  • Scanner 92 actuates the (stepwise) driving of a conveyor belt 34.
  • Present on the sorting station 97 are two sorting members 98 and 99 which under the control of scanners 93, 94 and 95 eject the cuttings 3 or allow them to pass, if necessary with the required time delay. If a cutting 3 is too small, in which case only scanner 93 scans this cutting 3, valve 102 is opened via actuating means 101 to allow passage of blowing air so that the cutting 3 is blown into a holder 104. In the case the cutting 3 is too large the scanners 93 and 95 initiate blowing of the cutting into holder 105 by means of blowing air which passes through the opened valve 106 through actuation by the actuating means 107.
  • the analog signal of the video camera 103 is con­verted in an analog-digital converter 112 into a digital signal which is processed in a gray value counter 113 and then sent to a control means 114.
  • This compares the incoming signal 115 with set values stored in the memory 116 which are threshold values for the criteria of the plants.
  • a monitor 118 indicates for instance how many cuttings 3, calculated from a particular moment in time, have met a particular cri­terion or criteria.
  • a digital output signal 117 of this control means 114 is converted in a digital-analog converter 119 and fed to a control member 120 which actuates one or more sorting mem­bers 121. Actuated in this way are for example the valves 101 and 106 for blowing pipes 98 and 99.
  • the converters 112, 119, the control member 120, the memories 116, the control means 114, the keyboard 122 and the monitor 118 can all form part of one and the same com­puter.
  • this can be used for learning to sort.
  • 50 samples are for instance taken from a batch of cuttings 3 for sorting and the measured criteria thereof are shown visually on the monitor. It can then be decided where to set the threshold values, for example for the length, and for the image values, in order to ensure that a reasonably uniform nursery stock is used.
  • the threshold values are entered using the keyboard 112 as set values and stored in the comparators 116. Sorting then takes place with these set values. It is also possible to enter the threshold values with the keyboard 122 using experience and otherwise obtained requirements for threshold values of the criteria.
  • the cutting 3 passing a scanning station 124 is transported on a belt 125 of plastic which is as trans­parent as matt glass. Disposed beneath the belt is a fluores­cent lamp 126.
  • a video camera 127 picks up the received light and thereby the shaded image of cutting 3.
  • the signal 128 is processed in an analog counter 129 and compared in a computer 130 with an entered set value 131 of a comparator 132.
  • the output signal 132 is used for controlling a sorting means 133.
  • Fig. 20 shows in principle a side view shown partly in section of a variant of fig. 11. whereby each reciprocating transport conduit 65 is additionally provided at the position of a conical constriction 136 with a blowing air nozzle 134 connected to a hose 135 in order to blow the cuttings 3 thro­ugh the quite narrow outlet 137 into a hole 62 having roughly the same diameter as the internal diameter of the outlet 137, which is in the order of magnitude of 2 cm, while the stem of the cutting has a diameter of ⁇ 2mm.
  • the internal diameter of the outlet 137 is preferably 22 mm. In the known state of the art holes of ⁇ 2mm are pricked in the soil portions, cor­responding with the diameter of the stem of the cutting.
  • the cutting is blown with air into the larger hole 62.
  • the hole 62 is then closed up by being tamped down by means of a beam 68 with pyramid recesses 69.
  • a slurry of soil with water is injected into the hole 68 during or after blowing in of the stem of the cutting.
  • the cutting 3 is then held fast by the suspension when the conduit 65 moves upward.
  • the slurry comes out of a nozzle 141 connected to a screw pump 142 which is driven each time through a stroke such that the required slurry quantity fills the preferably conical hole 62.
  • the smallest diameter of the pipe at the outlet through which a cutting can be blown without problems has been determined through tests. This diameter is 20 mm. If it is the intention to blow cutting into the hole of the soil portion the pipe must have the same or a smaller diameter internally than the hole in the pot. The hole in the soil portion then also becomes ⁇ 22 mm.
  • the pipe connecting onto the holder is also 34 mm internally.
  • the pipe is curved so that the cutting lying horizontally in a holder is placed straight up in pot­ting soil. After the bend the pipe narrows from ⁇ 34 mm inter­nally to ⁇ 22mm. The cutting is blown through the pipe with the stem to the front.
  • the cutting has to be set gradually into motion.
  • a hard blast of air has a disadvantageous effect.
  • the cutting does not get moving evenly with a hard blast of air.
  • the air passes along the cutting, much air is consumed and the result is rather poor. It is much more favourable to open the air valve gradually.
  • the cutting assumes the same speed as the air flow and is blown easily out of the holder 39 into the pipe.
  • the bend in the pipe does not give any problems, the cutting 3 is blown through it easily.
  • constriction 136 and the thinner pipe need not be a problem. If care is taken that the cutting maintains speed it will not catch in the constriction 136 or in the thinner portion. Blowing air into the constriction 136 has a favourable effect, this provides a suction action at the beginning of the pipe and additional air at the bottom so that the cutting keeps going in the thinner portion. The suction effect is not sufficient to get the cutting moving.
  • the best result is achieved by setting the cutting in motion with blowing air.
  • the valve must be opened gradual­ly. In order to keep the cutting moving, air is blown into the constriction 136. This also has the further advantage that it makes less noise and that less air is used.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Botany (AREA)
  • Developmental Biology & Embryology (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
EP89201783A 1988-07-07 1989-07-05 Méthode et appareil pour manipuler les plantes Withdrawn EP0353800A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL8801721A NL8801721A (nl) 1988-07-07 1988-07-07 Werkwijze en inrichting voor het behandelen van planten.
NL8801721 1988-07-07
NL8900227 1989-01-30
NL8900227A NL8900227A (nl) 1988-07-07 1989-01-30 Werkwijze en inrichting voor het behandelen van planten.

Publications (2)

Publication Number Publication Date
EP0353800A2 true EP0353800A2 (fr) 1990-02-07
EP0353800A3 EP0353800A3 (fr) 1990-05-23

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ID=26646398

Family Applications (1)

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EP89201783A Withdrawn EP0353800A3 (fr) 1988-07-07 1989-07-05 Méthode et appareil pour manipuler les plantes

Country Status (2)

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EP (1) EP0353800A3 (fr)
NL (1) NL8900227A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0433075A1 (fr) * 1989-12-13 1991-06-19 Btg International Limited Planteuse
EP0515001A1 (fr) * 1991-05-24 1992-11-25 William Tetenburg Dispositif de plantation et sa méthode de mise en oeuvre
US5209170A (en) * 1988-12-29 1993-05-11 Shadan Hojin Naganoken Nokyo Chiiki Kaihatsu Kiko Setting machine
FR2702927A1 (fr) * 1993-01-18 1994-09-30 Ferrand Claude Machine automatique multifonctions et procédé pour l'extraction des végétaux, leur contrôle pendant leur transfert, leur repiquage et leur conditionnement.
EP0653907A1 (fr) * 1992-08-10 1995-05-24 Williames Hi-Tech International Pty. Limited Appareil pour planter automatiquement des semis preleves d'un bac a semis rigide
NL1012417C2 (nl) * 1999-06-23 2000-12-28 Hazendonk Beheer B V Ab Werkwijze en inrichting voor het bewerken of verwerken van objecten.
US6286290B1 (en) * 1998-05-26 2001-09-11 Sig Pack Systems Ag Conveyor apparatus for depositing products in groups into containers
FR2843460A1 (fr) * 2002-08-09 2004-02-13 Pellenc Environnement S A Systeme d'analyse ou d'inspection automatique d'objets defilant sur un support
EP2548147A2 (fr) * 2010-03-13 2013-01-23 Carnegie Mellon University Logiciel assurant la vision par ordinateur et l'apprentissage automatique afin de classer et de trier des plantes
FR3011714A1 (fr) * 2013-10-14 2015-04-17 Alpes Conseils Etudes Ingenierie Machine et procede pour la plantation de boutures de plantes, en particulier de boutures de lavande et de lavandin.
EP3251493A1 (fr) * 2016-05-31 2017-12-06 Max Roots B.V. Procédé et dispositif de production d'un milieu de croissance stabilisé pour la culture d'une plante ou d'un semis
CN112273073A (zh) * 2020-11-06 2021-01-29 常德华诚现代农业开发有限公司 一种果树的快速栽培装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388035A (en) * 1979-08-01 1983-06-14 Bud Antle, Inc. Dibble tube soil plug planter
EP0135004A1 (fr) * 1983-07-29 1985-03-27 Circle Iron Work Co., Ltd. Transplanteur muni d'un sélecteur de plants
EP0163330A1 (fr) * 1984-04-27 1985-12-04 Heuft-Qualiplus B.V. Dispositif d'espacement de bouteilles
WO1987006791A1 (fr) * 1986-05-06 1987-11-19 Ösa Ab Procede et appareil permettant la plantation mecanisee notamment de jeunes arbres
EP0250190A2 (fr) * 1986-06-14 1987-12-23 Apv Corporation Limited Appareil pour rassembler des articles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388035A (en) * 1979-08-01 1983-06-14 Bud Antle, Inc. Dibble tube soil plug planter
EP0135004A1 (fr) * 1983-07-29 1985-03-27 Circle Iron Work Co., Ltd. Transplanteur muni d'un sélecteur de plants
EP0163330A1 (fr) * 1984-04-27 1985-12-04 Heuft-Qualiplus B.V. Dispositif d'espacement de bouteilles
WO1987006791A1 (fr) * 1986-05-06 1987-11-19 Ösa Ab Procede et appareil permettant la plantation mecanisee notamment de jeunes arbres
EP0250190A2 (fr) * 1986-06-14 1987-12-23 Apv Corporation Limited Appareil pour rassembler des articles

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5209170A (en) * 1988-12-29 1993-05-11 Shadan Hojin Naganoken Nokyo Chiiki Kaihatsu Kiko Setting machine
EP0433075A1 (fr) * 1989-12-13 1991-06-19 Btg International Limited Planteuse
AU633387B2 (en) * 1989-12-13 1993-01-28 British Technology Group Limited Transplanting apparatus
EP0515001A1 (fr) * 1991-05-24 1992-11-25 William Tetenburg Dispositif de plantation et sa méthode de mise en oeuvre
EP0653907A1 (fr) * 1992-08-10 1995-05-24 Williames Hi-Tech International Pty. Limited Appareil pour planter automatiquement des semis preleves d'un bac a semis rigide
EP0653907A4 (fr) * 1992-08-10 1995-07-19 Williames Hi Tech Int Appareil pour planter automatiquement des semis preleves d'un bac a semis rigide.
FR2702927A1 (fr) * 1993-01-18 1994-09-30 Ferrand Claude Machine automatique multifonctions et procédé pour l'extraction des végétaux, leur contrôle pendant leur transfert, leur repiquage et leur conditionnement.
US6286290B1 (en) * 1998-05-26 2001-09-11 Sig Pack Systems Ag Conveyor apparatus for depositing products in groups into containers
NL1012417C2 (nl) * 1999-06-23 2000-12-28 Hazendonk Beheer B V Ab Werkwijze en inrichting voor het bewerken of verwerken van objecten.
FR2843460A1 (fr) * 2002-08-09 2004-02-13 Pellenc Environnement S A Systeme d'analyse ou d'inspection automatique d'objets defilant sur un support
WO2004016362A1 (fr) * 2002-08-09 2004-02-26 Pellenc Selective Technologie (Sa) Systeme d'analyse ou d'inspection automatique d'objets defilant sur un support
EP2548147A2 (fr) * 2010-03-13 2013-01-23 Carnegie Mellon University Logiciel assurant la vision par ordinateur et l'apprentissage automatique afin de classer et de trier des plantes
EP2548147A4 (fr) * 2010-03-13 2014-04-16 Univ Carnegie Mellon Logiciel assurant la vision par ordinateur et l'apprentissage automatique afin de classer et de trier des plantes
US9527115B2 (en) 2010-03-13 2016-12-27 Carnegie Mellon University Computer vision and machine learning software for grading and sorting plants
FR3011714A1 (fr) * 2013-10-14 2015-04-17 Alpes Conseils Etudes Ingenierie Machine et procede pour la plantation de boutures de plantes, en particulier de boutures de lavande et de lavandin.
EP3251493A1 (fr) * 2016-05-31 2017-12-06 Max Roots B.V. Procédé et dispositif de production d'un milieu de croissance stabilisé pour la culture d'une plante ou d'un semis
NL2016863B1 (en) * 2016-05-31 2017-12-11 Max Roots B V A method and device for producing a stabilized growing medium for cultivation of a plant or seedling.
CN112273073A (zh) * 2020-11-06 2021-01-29 常德华诚现代农业开发有限公司 一种果树的快速栽培装置

Also Published As

Publication number Publication date
EP0353800A3 (fr) 1990-05-23
NL8900227A (nl) 1990-02-01

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